发明名称 |
PROCESS FOR PREPARING AN ESTER OF A CELLULOSE ETHER IN THE PRESENCE OF AN ALIPHATIC CARBOXYLIC ACID. |
摘要 |
Two or more esters of a cellulose ether, each having the same ether and ester substituents but different weight average molecular weights are prepared in a process which comprises the steps of esterifying a cellulose ether with (i) an aliphatic monocarboxylic acid anhydride or (ii) a dicarboxylic acid anhydride or (iii) a combination of an aliphatic monocarboxylic acid anhydride and a dicarboxylic acid anhydride in the presence of an aliphatic carboxylic acid as a reaction diluent in two or more separate reactions, wherein in each reaction a different molar ratio [aliphatic carboxylic acid / anhydroglucose units of cellulose ether] is used to produce esters of the cellulose ether of different weight average molecular weights. |
申请公布号 |
MX2015002425(A) |
申请公布日期 |
2015.11.06 |
申请号 |
MX20150002425 |
申请日期 |
2013.08.15 |
申请人 |
DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
ROBERT L. SCHMITT;OLIVER PETERMANN;MATTHIAS SPREHE;ANDREW C. ARTHUR;WARREN K. MILLER;DAVID K. LYON |
分类号 |
C08B11/20;C08B13/00 |
主分类号 |
C08B11/20 |
代理机构 |
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代理人 |
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地址 |
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